20102202101077 has 2 divisors, whose sum is σ = 20102202101078. Its totient is φ = 20102202101076.

The previous prime is 20102202100999. The next prime is 20102202101087. The reversal of 20102202101077 is 77010120220102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10103205530916 + 9998996570161 = 3178554^2 + 3162119^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102202101077 - 2¹⁹ = 20102201576789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102202101087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051101050538 + 10051101050539.

It is an arithmetic number, because the mean of its divisors is an integer number (10051101050539).

Almost surely, 2^{20102202101077} is an apocalyptic number.

It is an amenable number.

20102202101077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102202101077 is an equidigital number, since it uses as much as digits as its factorization.

20102202101077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 20102202101077 its reverse (77010120220102), we get a palindrome (97112322321179).

The spelling of 20102202101077 in words is "twenty trillion, one hundred two billion, two hundred two million, one hundred one thousand, seventy-seven".